Jan. 6, 2016, 1:40 p.m.

A neighborhood in Porter Ranch. Gov. Jerry Brown visited with residents in the neighborhood, where fumes from a Southern California Gas Co. well have sickened people and forced the relocation of families. (Katie Falkenberg / Los Angeles Times)

Jerry Brown declares a state of emergency in Porter Ranch, where thousands of residents have been evacuated due to a massive gas leak.

In declaring the emergency, the governor notes the widespread disruption the gas leak has caused and reiterates the state's efforts to help fix the problem.

Feb. 18, 2016, 10:11 a.m.

L.A. County Supervisor Michael D. Antonovich joined U.S. Sen. Barbara Boxer and other state and local officials insisting on air-quality testing before Porter Ranch-area residents who have been relocated return home.

Feb. 8, 2016, 1:05 p.m.

In Porter Ranch, residents are reporting a range of symptoms related to the gas leak. Some with bloody noses and headaches; others with nothing -- even within the same family. Resident Patrick Perez shares how his family has been affected.

Our family is divided. My wife thinks that her health and my kids’ health has been adversely affected. I spend time away at work and I have not been feeling anything. My wife has had bloody spotting from her nose and muscle spasms. Our kids initially hid from us that they had experienced dizziness because they thought we would blame the iPad.

Jan. 29, 2016, 3:17 p.m.

Next week U.S. Sens. Diane Feinstein and Barbara Boxer will try to add an amendment to energy legislation under consideration in the Senate. It would require Energy Secretary Ernest Moniz to conduct a review and make recommendations about stopping the leak and preventing future ones.